@book { MittenimSommermitteninsHerz,
    title = "Mitten im Sommer, mitten ins Herz",
    author = "Anne {Lux}",
    year = "2016",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1334590"
}